获得隐藏领域的价值

Question

我引用了隐藏的字段,如:

var h = document.getElementById('myHiddenField');

如何将值设置为100,然后使用简单的alert()输出值;？

Answer 1

var h = document.getElementById('myHiddenField');
h.value = 100;
alert(h.value);

Answer 2

//get value
var hidderValue = document.getElementById('myHiddenField').value;

//set value
document.getElementById('myHiddenField').value = 200;